#183540#183540

#183540 is a dark, muted cyan. Relative luminance 0.031; OKLCH L 31.2% C 0.040 H 225.1°. Best body text is #FFFFFF at 12.95:1 contrast (WCAG AA passes).

Color values

HEX	#183540
RGB	rgb(24, 53, 64)
HSL	hsl(197, 45%, 17%)
HSV	hsv(197, 63%, 25%)
CMYK	cmyk(62.5%, 17.2%, 0%, 74.9%)
CIE-LAB	lab(20.48, -7.07, -10.19)
CIE-LCH	lch(20.48, 12.41, 235.23°)
OKLab	oklab(31.16% -0.0282 -0.0283)
OKLCH	oklch(31.16% 0.04 225.1)
XYZ	xyz(2.5749, 3.1103, 5.3142)
Luminance	0.0311 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183540 #402318

analogous

#184037 #183540 #182140

triadic

#183540 #401835 #354018

tetradic

#183540 #371840 #402318 #214018

square

#183540 #371840 #402318 #214018

split-complementary

#183540 #401821 #403718

monochromatic

#081216 #081216 #183540 #295A6D #397F99

Accessibility & contrast

On white

12.95

#183540 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.62

#183540 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183540

12.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183540	#FFFFFF	#000000	##FFFFFF
##183540	1.00	12.95	1.62	12.95
#FFFFFF	12.95	1.00	21.00	1.00
#000000	1.62	21.00	1.00	21.00
##FFFFFF	12.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F3441

Deuteranopia (green-blind)

#292F40

Tritanopia (blue-blind)

#003839

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #183540;
/* rgb */ color: rgb(24, 53, 64);
/* oklch */ color: oklch(31.2% 0.040 225.1);

Tailwind

colors: {
  custom: {
    50: '#596c74',
    500: '#183540',
    950: '#000000',
  },
}

SCSS

$custom: #183540;
$custom-light: #596c74;
$custom-dark: #000000;

JSON

{
  "hex": "#183540",
  "rgb": {
    "r": 24,
    "g": 53,
    "b": 64
  },
  "hsl": {
    "h": 196.5,
    "s": 45.455,
    "l": 17.255
  },
  "oklch": {
    "l": 0.31162,
    "c": 0.03997,
    "h": 225.1
  },
  "luminance": 0.03111
}

Semantic roles & 50–950 ramp

primary

#183540

secondary

#774D3D

accent

#7753D5

background

#F5F6F7

surface

#E9EBED

border

#C5C6C8

text

#040608

muted

#797A7B

Preview Lab

Preview with #183540

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →